JP2011058600A - Lubricating device of follower bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To assemble a plate spring S in an integrated state with a lubricating member L. <P>SOLUTION: The lubricating member L forms a pair of projection parts 9, 9 in contact with an outer ring 2, and a pair of wall faces 13, 13 on a side opposed to a side face where the projection parts 9, 9 are formed. The plate spring S has a chevron cross-sectional shape, a pair of projection pieces 14, 14 in contact with the wall faces 13, 13 are formed of the lubricating member L to a skirt part of the chevron shape, and the projection pieces 14, 14 sandwich the pair of wall faces 13, 13 therebetween. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lubricating device for lubricating an outer ring of a follower bearing.

As a lubrication device for this type of follower bearing, the one disclosed in Patent Document 1 is conventionally known, and this conventional device is shown in FIG.
The conventional lubricating device D shown in FIG. 6 includes a casing C, a lubricating member L incorporated in the casing C, and a plate member P that blocks the side surface of the casing C.
Then, the plate member P is screwed to the casing C in a state in which the lubricating member L is incorporated in the casing C. The lubricating device D shown in FIG. 6 includes the casing C and the plate member P as separate members. It is composed.

The conventional lubrication apparatus D shown in FIG. 6 eliminates the problem because the casing C and the plate member P are formed of separate members, so that the number of parts increases and the number of assembly steps increases. Therefore, the lubricating device shown in FIGS. 3 and 4 has been developed, and the casing C of this lubricating device is formed by integrally molding a metal ring r and a resin with a mold.
In the follower bearing B using the lubricating device D, an outer ring 2 is rotatably provided around the support shaft 1, and a screw portion 1a is integrally provided at one end of the support shaft 1, and the screw portion 1a is provided on the outer ring. 2 protrudes outward.

  The follower bearing B is incorporated in the casing C and supports a support object M to be a rolling surface as shown in FIG. That is, the threaded portion 1a is passed through the fixing member F, and a nut is screwed and fixed to the penetrating portion. The follower bearing B fixed to the fixing member F in this way contacts the support target M, and rotates when the fixing member F and the support target M move relative to each other, thereby exhibiting a bearing function.

  On the other hand, the casing C that holds the lubricating member L for lubricating the outer ring 2 is formed with the shaft hole 4, and the bottom surface 5 with the support shaft 1 of the follower bearing B passing through the shaft hole 4. Is configured to face the outer ring 2. A positioning recess 6 is formed in the center of the bottom surface 5 so as to be parallel to the axis of the support shaft 1. The positioning recess 6 has a mountain shape in cross section.

Further, in the casing C, side surfaces 7 and 7 are formed on both sides of the bottom surface 5, and latching steps 8 and 8 are formed on the side surfaces 7 and 7, respectively.
In the casing C as described above, a lubricating member L made of a sintered resin member having a porous structure impregnated with a lubricant is incorporated. As the lubricating member L, a material obtained by mixing a powder of a thermoplastic resin material such as polyethylene or polypropylene and a lubricant made of oil or grease to be overheated and solidified may be used.

  And in the state which incorporated this lubricating member L in the casing C, while providing a pair of protrusions 9 and 9 holding the predetermined space | interval in the side surface facing the outer ring | wheel 2 in parallel with the axis line of the support shaft 1, The protrusions 9 and 9 are brought into contact with the outer ring 2, but their contact surfaces are arcuate surfaces. The outer ring 2 is lubricated by bringing the arc surfaces of the protrusions 9 and 9 into contact with the outer ring 2 at the same time, and the rolling surface of the support object M is simultaneously coated with the lubricant adhered to the outer ring 2 at this time. Can be lubricated.

Further, the lubricating member L is formed with recesses 10 and 10 that open downward on the surface opposite to the side surface on which the protrusions 9 and 9 are formed, and on the outside of the recesses 10 and 10. The latching protrusions 11 and 11 that are hooked on the latching step portions 8 and 8 are formed.
The lubricating member L configured as described above is incorporated in the casing C with the leaf spring S interposed between the bottom surface 5 and the leaf spring S. The configuration coincides with the recess 6.

Then, when the lubricating member L is incorporated into the casing C, the casing C is set with the bottom face 5 down as shown in FIG. 4 and the leaf spring S is set with its top 12 aligned with the positioning recess 6. The lubricating member L is pushed into the casing C against the spring force of the leaf spring S while the leaf spring S is incorporated, and the latching protrusions 11 and 11 are engaged with the latching step 8 of the casing C. , 8.
Further, in the casing C in which the lubricating member L is incorporated as described above, the threaded portion 1a of the support shaft 1 is passed through the shaft hole 4, and the threaded portion 1a is provided in the fixing member F shown in FIG. Insert the spring washer and fix it with a nut.

Japanese Patent No. 4278659

  In the conventional follower bearing shown in FIGS. 3 and 4, since the leaf spring S only places the top 12 in the positioning recess 6, the leaf spring S is in an extremely unstable state until the lubricating member L is assembled. Kept. Therefore, when the lubricating member L is incorporated, the top 12 of the leaf spring S may come off from the positioning recess 6. However, once the lubrication member L is assembled, the assembled state of the leaf spring S cannot be confirmed from the outside, so if the leaf spring S is assembled in a shifted state, it is shipped as it is. Further, if the leaf spring S is forcibly incorporated with the displacement, the leaf spring may be deformed, but even if the leaf spring S is deformed, it may be shipped without noticing it.

  If the leaf spring S remains displaced or deformed, the balance of the pressing force of the projections 9 and 9 provided on the lubricating member L with respect to the outer ring 2 is lost. For this reason, there is a problem in that an eccentric load acts on the outer ring 2 and the bearing function is impaired.

  Further, although the leaf springs S are put into the positioning recess 6 one by one, they may be put in a state where two are stacked. If the two leaf springs S are stacked together, the spring force becomes too strong, and in this case as well, there is a problem that the function as a bearing is impaired. In addition, if two sheets are stacked, more plate springs S than necessary are used, so there is a problem in terms of cost.

In addition, when the casing C and the plate member P shown in FIG. 6 are separate members, even when the plate spring S is displaced or deformed as described above, confirmation is made when the plate member P is attached. be able to. However, the displacement and deformation of the leaf spring S cannot be confirmed under the structure in which the casing C is integrated.
That is, the above-described problem of the lubricating device shown in FIGS. 3 and 4 is newly generated by integrating the casing C into an integral structure.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a follower bearing lubrication device in which a leaf spring can be always set in a normal state and the two are not inadvertently stacked.

  The present invention includes an outer ring that is rotatable relative to a support shaft, a casing that forms a shaft hole that passes through the support shaft and covers the outer ring that passes through the support shaft in the shaft hole, and a lubricant that is incorporated in the casing. The present invention relates to a lubrication device for a follower bearing comprising a resin-made lubrication member impregnated with a plate spring and a leaf spring which is incorporated between the casing and the lubrication member and presses the lubrication member against an outer ring.

  In the first aspect of the invention, the lubricating member includes a pair of protrusions that are in contact with the outer ring and a pair of wall surfaces on the side opposite to the side surface on which the protrusions are formed. And a pair of projecting pieces that come into contact with the wall surface of the lubricating member, and the projecting pieces sandwich the pair of wall surfaces.

  In the second invention, a positioning recess for holding the top of the leaf spring is formed on the bottom surface of the casing facing the outer ring.

  According to the first invention, since the leaf spring is configured to sandwich the wall surface of the lubrication member with the projecting pieces formed on both sides thereof, the leaf spring is assembled to the lubrication member and integrated into the casing. Since it can be assembled, the leaf spring will not be displaced or deformed as in the prior art. Therefore, the lubricating member does not apply an uneven load to the outer ring, and the function as a bearing is not impaired.

  In addition, since the leaf spring can be set in advance on the lubricating member, the leaf spring is not set with the two leaf springs stacked. Therefore, the problem that occurs when two leaf springs are set in a stacked state does not occur.

It is the perspective view which notched a part of casing of the lubricating device of this invention. It is a partial cross section figure of the state which separated the casing of this invention, and the lubricating member which assembled | attached the leaf | plate spring. It is the perspective view which notched some casings of the lubrication apparatus of the conventional follower bearing. It is a partial sectional view of a lubricating member assembled with a casing and a leaf spring in a conventional lubricating device. It is a figure which shows the attachment state of the conventional follower bearing. It is a disassembled perspective view which shows the lubricating device of the conventional follower bearing.

In the embodiment shown in FIGS. 1 and 2, the structure of the leaf spring S is different from the conventional one, but the other configuration is the same as the conventional one. Therefore, in the following description, the same components as those in the related art will be described with the same symbols.
In the follower bearing B used in this embodiment, an outer ring 2 is rotatably provided around the support shaft 1, and a screw portion 1 a is integrally provided at one end of the support shaft 1, and the screw portion 1 a is provided outside the outer ring 2. It protrudes in the direction. In addition, the code | symbol 3 in a figure is a hexagon hole for rotating the screw part 1a, and it inserts the hexagon wrench which is not illustrated in this hexagon hole 3, and rotates the screw part 1a.

On the other hand, the casing C of the lubricating device D that holds the follower bearing B and holds the lubricating member L for lubricating the outer ring 2 forms a shaft hole 4, and the threaded portion of the outer ring 2 is formed in the shaft hole 4. The bottom surface 5 is configured to face the outer ring 2 in a state where 1a is penetrated. A positioning recess 6 is formed in the center of the bottom surface 5 so as to be parallel to the axis of the support shaft 1. The positioning recess 6 has a mountain-shaped cross section.
Further, latching step portions 8 and 8 are formed on the side surfaces 7 and 7 of the casing C parallel to the positioning recess 6, respectively.

In the casing C as described above, a lubricating member L made of a sintered resin member having a porous structure impregnated with a lubricant is incorporated. The lubricating member L is obtained by mixing a powder of a thermoplastic resin material such as polyethylene or polypropylene and a lubricant made of oil or grease and solidifying it by overheating. The lubricating member L may be obtained by mixing a powder of a thermoplastic resin material such as polyethylene or polypropylene and a lubricant made of oil or grease and solidifying it by overheating.
And in the state which incorporated this lubricating member L in the casing C, while providing a pair of protrusions 9 and 9 holding the predetermined space | interval in the side surface facing the outer ring | wheel 2 in parallel with the axis line of the support shaft 1, The protrusions 9 and 9 have a contact surface with the outer ring 2 as an arc surface.

  Further, the lubricating member L is formed with recesses 10 and 10 that open downward on the surface opposite to the side surface on which the protrusions 9 and 9 are formed, and on the outside of the recesses 10 and 10. The latching protrusions 11 and 11 that are hooked on the latching step portions 8 and 8 are formed. Moreover, it is set as the parallel wall surface 13 and 13 which is a wall surface of the both sides in the said recessed parts 10 and 10 and is located inside.

The lubricating member L configured as described above is incorporated in the casing C with the leaf spring S interposed between the bottom surface 5 and the leaf spring S. The configuration coincides with the recess 6.
The greatest feature of this embodiment is that a pair of parallel projecting pieces 14 and 14 that come into contact with the wall surfaces 13 and 13 of the lubricating member L are formed at the skirt portion of the plate spring S having a mountain shape. The projecting pieces 14 and 14 sandwich the pair of wall surfaces 13 and 13.

  When incorporating the lubricating member L as described above into the casing C, first, the wall surfaces 13 and 13 of the lubricating member L are sandwiched between the pair of parallel projecting pieces 14 and 14 of the leaf spring S, as shown in FIG. Then, the leaf spring S is assembled to the lubricating member L to integrate them. The pair of projecting pieces 14 and 14 do not need to be accurately maintained in parallel as long as the tightening force for sandwiching both wall surfaces 13 and 13 of the lubricating member L is sufficient.

In this way, the lubricating member L integrated with the leaf spring S is pushed into the casing C, and the latching protrusions 11 and 11 of the lubricating member L are hooked on the latching step portions 8 and 8 formed on the casing C. .
The latching protrusions 11 and 11 are tapered from the tip on the bottom surface 5 side. However, since the recess 10 is present, the latching projections 11 and 11 are elastically deformed to the center side, and the latching step portions 8 and 8 of the casing C are elastically deformed. It can be easily pushed into the narrow space of 8.

  In this embodiment, when the latching protrusions 11 and 11 are firmly hooked on the latching step portions 8 and 8, the top portion 12 of the leaf spring S inevitably coincides with the positioning recess 6. Yes.

Therefore, according to this embodiment, when the lubricating member L is assembled, the lubricating member L and the leaf spring S are integrated, so that the leaf spring S is set in the casing C in advance as in the prior art. Unlike the case where the lubricating member L is pushed in after that, the position of the leaf spring S does not shift during the assembly process of the lubricating member L.
Further, since the leaf spring S can be integrated with the lubricating member L in advance, there is no possibility that the leaf spring S is mistakenly overlapped. Even if two sheets are stacked, one can be easily removed.

2 Outer ring C Casing 4 Shaft hole 5 Bottom 6 Positioning recess L Lubrication member 9 Protrusion S Leaf spring 12 Top 13 Wall surface 14 Protrusion

Claims (2)

  An outer ring that is rotatable relative to the support shaft, a shaft hole that penetrates the support shaft and a casing that covers the outer ring that passes the support shaft through the shaft hole, and a lubricant incorporated in the casing are impregnated. In a lubricating device for a follower bearing comprising a resin-made lubricating member and a leaf spring that is incorporated between the casing and the lubricating member and presses the lubricating member against the outer ring, the lubricating member contacts the outer ring A pair of protrusions and a pair of wall surfaces are formed on the side opposite to the side surface on which the protrusions are formed, and the leaf spring has a mountain shape in cross section and the lubrication at the bottom of the mountain shape. A follower bearing lubricating device in which a pair of projecting pieces contacting the wall surface of the member is formed, and the projecting pieces sandwich the pair of wall surfaces.   The follower bearing lubricating device according to claim 1, wherein a positioning recess for holding a top portion of the leaf spring is formed on a bottom surface of the casing facing the outer ring.

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